Here's another TdF clip with a dog wreck, and this one is two riders at break away speeds hitting this dog in the head and shoulder. You'll see the dog run away on the left of the images by the red directors car. (this also has the yellow lab wreck at the end). This reinforces the point, it would be damned hard to kill a lab with a kick from a passing person on a bike. FWIW, I've share this video and point with the publication that posted the story.